This course concentrates on the twenty-six most common groups, species and varieties of coloured gemstones giving a comprehensive overview of their physical and optical properties, their unique identifying features, and how they are graded.
Physical properties, geology, localities, crystal system, chemical composition and causes of colour, varieties, absorption spectra,
pleochroism, inclusions, fluorescence, gem identification, synthesis, common treatments and enhancements, and care guidelines.
Gemstones covered in this course include corundum (rubies and sapphires), beryl (emeralds, aquamarines and other precious beryl),
chrysoberyl (alexandrite and other chrysoberyl), spinel, zircon, topaz, tourmaline, peridot, quartz, garnet, tanzanite, lapis lazuli,
turquoise, spodumene (kunzite and hiddenite), feldspars, iolite, andalusite, diopside, apatite, and organic gems (pearls, coral, jet,
ivory, and amber).